Metal drum



PL WOLF METAL DRUM Filed May 29, 1950 Nov. 22, 1932.

, This drum is protected by jacket A, The more, owing to the described shape of flange .ineld as close as possible to the front wall. te admit resistance welding and grindingaplet Fatented Newo 22, l32 E enema WLli", @JF ESSEX, GERMANY, ASSIGNQR EQ FREEZE KRUPP AKTIENGESEE- SGHAJFE, @l" ESSELQN-EHE-RUHE, GER

rennet nnnnz d utation filed may-29, 1930, Serial at. 457,264, and in Germany .Tune 7, 1929.

v lhe invention relates to drums, more par- In manufacturing the described drum one ticularl-y those manufactured from stainless proceeds in the following manner The front steel and intended for liquids which easily wall F is inserted first in the shell B B B acquire a bad taste. The invention has for and joined thereto by the welds D and E. W

5 its object to so improve drums of this class After welding the free edge of flange f is that no impure corners can exist in the drum. ground ofl to such an extent that it subsides In order that the invention can be more without any shoulder into the shell, as illusreadily understood an embodiment of a drum trated in Figure 2. Thereupon the front wall manufactured according to the invention is C is inserted and welded and ground ofl in the 10 illustrated by way of example in the accomsame manner, the respective members of the 60 panying drawing in which welding apparatus and the grinding tool be- Figure l is a longitudinal section through ing introduced through the aperture f. This th drum, and done, plate G is inserted in aperture f, where- Figure 2 is a detail of the drum illustrated upon the flanges ,f and g are interconnected in Figure 1, on an enlarged scale. by the reslstance weld H. 65

' lhe drum is composed of a jacketA prefer- As to be seen from the foregoing, the deably made from mild steel, and an inner drum scrlbed drum aflords the advantage above proper which is made from stainless steel and mentioned of no corners existing therein has a comparatively small wall thickness. where unpurltles mlght remain. Furthershell of the drum proper has a short cylin- 3 and the weld H no'impurities can deposit drical central portion B and two tapering also on the Joint between the parts F and G. portions B, B which intheir turn subside What I claim is again each into a short cylindrical end por- 1. A metal drum one front wall of'which tion B A. front wall C having an inwardly has an inwardly directed flange inserted in directed flange c is inserted by means of the and joined to the shell by a resistance welded latter in one of the end portions 13 of the joint, so large an aperture being provided drum proper, the flange 0 on its free edge in one of the front walls as to admit introbeing joined to portion B by a tightemng duction of resistance welding means in the welding seaml) obtainedby resistance welddrum, said aperture being bordered by a so ing, and by another welding seam E therebesharply bent-off outwardly directed flan e hind. llnthe same manner another fr and covered by a plate projecting inwardly e t 118N133 all g y alrefited ng beyond the internal surface of theappurtee f 15 msellea 111 PPPQ drum @115; B2 and mint front wall and having an outwardly diconnected thereto llkewlse y wemmgs D and rected flange, .said two outwardly directed T fmm? W F h a central Circular flanges being inter-connected by a resistance l 7' serving 9 mtmdmefihe respec' welded joint as close as possible to the front tive members of a resistancewelding apparan d lusl and grind-mg, tool this. aperture beings 2. A metal drum one front wall of which L bmidergol by g ggz dllregted g, has an inwardly directed 'flangeinserted in Whlch 1S llharlgx em 0 mm dent Wall and joined to the shell both by a resistance The aperture is closed by a plate G having d1 fimcted flan e 1 an& inward} weld directly on its free edge and another an on War y g g y weld behind said resistance weld, the free cts e end the inner surface of front A r hi d r to si ich an extentithat, seen in lateral edge, i Saul flailing? having g W t-D6 direction, the rounded-ed edge by which the b d smmtflly mm the wall 017 Smdl m plate G subsides into flange 1 lies above the Wiihml? y shwldera inner surface of front wall The flanges 3. A metal drum according to claimQ, an '5 and 1 are interconnected by a resistance aperture in at least one of the front walls 2 reaaeoo paratus for forming said joints and grindmg sharply said flange edge.

4. A metal drum one front wall of which has an inwardly directed flange inserted in 55 and joined to the shell by a resistance-welded joint, one front wall consisting of a ringshaped outer portion and a circular plate portion resistance-welded to said ring-shaped portion, whereby resistance-welding apparam tus may be introduced into the drum within said ring-shaped outer portion previous to the welding of said circular plate portion thereto.

5.,, A metal drum the front walls of which 15 have zeach an inwardly directed flange inserted in and joined to the shell by a resistance-welded joint, one front wall consisting of a ring-shaped outer portion and a circular plate portion resistance-welded .to said 20 ring-shaped portion, whereby resistancewelding apparatus may be introduced into the drum within said ring-shaped outer portion previous to the welding of said circular plate portion thereto.

25 6. A metal drum comprising a shell and two front walls, inwardly directed flanges upon said front walls inserted in and joined to the shell by resistance-welded joints, said flanges having their free ends subsiding smoothly into the wall of said shell without any shoulders, one front wall consisting of a ring-shaped outer portion and a circular plate portion resistance-welded to said ringshaped portion, whereby resistance-welding 35 apparatus may be introduced into the drum within said ring-shaped outer portion previous to the welding of said circular plate portion thereto. c

The foregoing specification si ed at Cologne, Germany, this 16th day 0 May, 1930.

' j PETER WULF 

